What is the connotation of duration?

Duration is a period of time in which something exists or persists. It is also a way to refer to something from the time it begins up until it's completion.

Used in a sentence....

The teacher said, "There will be no more talking for the duration of this test." Duration is how long or how short the note is. This is taught in music. Duration is how long or how short the note is. This is taught in music.